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CONVERTIBLE NOTES PAYABLE (Details) (USD $) | 0 Months Ended | 12 Months Ended | 60 Months Ended | 61 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 20, 2011 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 20, 2011 | Dec. 31, 2011 | Jan. 31, 2007
Convertible Notes Payable [Abstract] |  |  |  |  |  |  |  |
Redemption of convertible notes payable |  |  | $ (48,997,000) | $ (240,000) | $ (46,736,000) |  |  |
Gains (Losses) on Extinguishment of Debt |  |  | 1,268,000 | 0 | 7,057,000 |  |  |
Convertible Notes Payable | 930,000 |  | 930,000 | 48,712,000 |  |  | 930,000 |
Convertible Notes Payable [Member] |  |  |  |  |  |  |  |
Convertible Notes Payable [Abstract] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | 115,000,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 3.75%
Debt Instrument, Convertible, Effective Interest Rate |  |  | 6.03% |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ 29.26 |  | $ 29.26 |  |  |  | $ 29.26 | $ 30.86
Common Shares Trading Price, Percentage of Conversion Price For Prior to Maturity Conversion |  |  | 130.00% |  |  |  |  |
Measurement Period, Conversion Prior to Maturity |  |  | 20 days |  |  |  |  |
Consecutive Trading Period |  |  | 30 days |  |  |  |  |
Redemption Price, Percentage of Principal Amount Plus Accrued and Unpaid Interest | 100.00% |  |  |  |  |  |  |
Required Repurchase Price, Percentage of Principal Amount Plus Accrued and Unpaid Interest |  | 100.00% |  |  |  | 100.00% |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments |  |  |  |  |  | 11,300,000 |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component |  |  |  | 1,100,000 |  |  |  |
Interest expense relating to contractual interest coupon |  |  | 1,500,000 | 1,900,000 | 2,500,000 |  |  |
Additional non-cash interest expense |  |  | 800,000 | 1,000,000 | 1,300,000 |  |  |
Redemption of convertible notes payable |  | 24,000,000 | 48,800,000 |  |  |  | 114,100,000 |
Purchase of Convertible Notes Payable, Average Discount Rate | 11.00% |  | 11.00% |  |  |  | 11.00% |
Gains (Losses) on Extinguishment of Debt |  |  | (400,000) |  | 7,100,000 |  |  |
Long-term Debt, Gross | $ 900,000 |  | $ 900,000 | $ 49,800,000 |  |  | $ 900,000 |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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